227620660221 has 16 divisors (see below), whose sum is σ = 338407379520. Its totient is φ = 151210892880.

The previous prime is 227620660199. The next prime is 227620660249. The reversal of 227620660221 is 122066026722.

227620660221 is a `hidden beast` number, since 2 + 2 + 7 + 6 + 20 + 6 + 602 + 21 = 666.

It is not a de Polignac number, because 227620660221 - 2⁷ = 227620660093 is a prime.

It is a super-2 number, since 2×227620660221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227620660291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14887050 + ... + 14902331.

It is an arithmetic number, because the mean of its divisors is an integer number (21150461220).

Almost surely, 2^227620660221 is an apocalyptic number.

It is an amenable number.

227620660221 is a deficient number, since it is larger than the sum of its proper divisors (110786719299).

227620660221 is a wasteful number, since it uses less digits than its factorization.

227620660221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29789673 (or 29789667 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

Adding to 227620660221 its reverse (122066026722), we get a palindrome (349686686943).

The spelling of 227620660221 in words is "two hundred twenty-seven billion, six hundred twenty million, six hundred sixty thousand, two hundred twenty-one".